BASE
LV-8RCL-N
Low Voltage
Power Distribution Module
Installation and Operation Manual
BASE Electronics, Inc.
2856-C Janitell Road • Colorado Springs, CO 80906 • (719) 540-9697 • Fax (719) 540-9698
REVISED 1/02
Figure 1 - LV-8RCL-N Wiring Diagram
BASE Electronics, Inc.
2856-C Janitell Road • Colorado Springs, CO 80906 • (719) 540-9697 • Fax (719) 540-9698
Limited Warranty
The LV-8RCL-N Low Voltage Power Distribution Module is warranted by BASE Electronics against
manufacturing defects in materials and workmanship for a period of 2 years from date of purchase. During
this period, any warranty repair required will be made at no charge for parts or labor. This warranty does
not apply to any work or materials provided by any outside persons or technicians involved in the instal-
lation, unauthorized repair, connection, or testing of this product. This warranty does not cover any dam-
age or failure caused by or attributable to Acts of God, abuse, misuse, improper or abnormal usage, faulty
or improper installation or maintenance, neglect or accident. BASE Electronics is not responsible or liable
for any special, consequential or indirect damages resulting from or in connection with the use or perfor-
mance of this product as pertaining to economic loss, property loss, costs for removal or installation, or
loss of revenues or profit. Except as provided herein, BASE Electronics makes no expressed or implied
warranties. The duration of product performance for its intended purpose is limited to the duration set
forth herein.
For Warranty or other repair, send the product postage prepaid to BASE Electronics and include Sender's
name, company, address, phone and brief problem description. BASE Electronics will notify sender of
any required repair costs not covered under this warranty prior to making such repairs.
This Warranty gives you specific legal rights. You may have other rights that vary from state to state.
Figure 2 - LV-8RCL-N Schematic Diagram
LISTED
®
U
LISTED
®
U
LV-8RCL-N Specifications
• Indoor Temperature Range: -25° C. to +70°C.
• Electrical
Maximum Voltage AC/DC: 30V
Maximum Total Current: 8A
Maximum Recommended Current per Output: 2.5A
Maximum Total Relay Coil Current Draw: 1A
Connections: Captive Screw Terminals for #14 to #22AWG Wire
• Size: 5.00" wide by 8.00" long by 2.50 maximum height (inches) with relays installed.
• Mounting: (4) 3/8 inch high nylon standoffs included
• Indicators, Controls and Jumpers
Red LED Indicators at all 9 relay positions
Common Power - and +, Cut = Separate Relay Control Power, Uncut = Common Power
Mode Jumpers Uncut = 8 Continuous, Cut 8D = w/Disconnect, Cut 4x4 = 4x4 Mode
• Special Features
Mode Jumpers, 4x4 Mode
Power Disconnect Relay Socket with Auxiliary Contact Terminals
8 Output Isolation Relays with LED Indicators
© Copyright 2002 - BASE Electronics, Inc.
Access Control
Panel Contact
Door Release
Pushbutton
Normally Closed
Dry Contacts of
Fire Alarm Panel
1
2
3
4
5
6
7
88
7
6
5
4
3
2
1
PW
R
OUTPUTS CONTROLS
-+
2
3
4
5
6
7
8
1
Electric
Lock
Electric
Strike
From
Lock
Power
Supply
Write Fuse Size Here
BASE
LOW VOLTAGE POWER
9
F
CT
L
+- ST Co
m
N
O
N
C
CONTROL FUSE
COM PWR
JUMPERS
From
Relay
Power
Supply
DISC
RELAY
DISTRIBUTION MODULE
NC
NO
Com
NC
NO
Com
NC
NO
Com
NC
NO
Com
NC
NO
Com
NC
NO
Com
NC
NO
Com
NC
NO
Com
LV-8RCL-N
8 D
4X4
Open Collector
(sink) Output
Com
Output
+
-
INPUT MAX.
30VAC/ DC, 8A.
OUTPUTS CONTROLS
1NC
1
1NO
Com
4
5
8
F
4NC
4NO
Com
5NC
5NO
Com
8NC
8NO
Com
- +
PWR + -
CTL
ST NO C NC
4 X 4
8 D
C P
CONTROL
FUSE
Lock
-
+
LV-8RCL-N
Low Voltage Power Distribution Module
The LV-8RCL-N distributes power from a low voltage power source to 8 fused out-
puts through 8 Output Isolation Relay sockets. Terminals are provided for negative or
sink control of each output relay by an Access Control system. Output devices can be
powered separately from the control relays by configuring Common Power Jumpers.
A 2-pole Disconnect Relay socket is provided and easily interfaces with Fire, Life
Safety or Alarm Panels to provide Emergency Power Disconnect. Relay auxilary con-
tact terminals are provided for alarm monitoring of the Disconnect feature.
Each unit includes jumpers configurable for 3 modes of operation:
1) 8 outputs that are disconnected by the Disconnect Relay
2) 8 outputs that are unaffected by the Disconnect Relay
3) 4 x 4 mode (Outputs 1-4 = Mode 1, Outputs 5-8 = Mode 2)
The LV-8RCL-N includes red LED indicators at each of the 9 relay positions for
identification of energized relays.
The module is 5.00" wide x 8.00" long. The installed height with relays is 2.50".
Standoffs are included for mounting the circuit board in a user-supplied enclosure.
Relays and 3AG-type Fuses are provided separately. To meet UL Listing require-
ments, the relays selected should be Idec Corp., P/N RH1B-U SPDT or P/N RH2B-U,
DPDT, 12vdc or 24vdc.
* * * WARNING * * *
Turn off all power feeding the module terminals before servicing or changing input/output wiring, removing
or reinstalling fuses or relays, or cutting jumpers. Failure to observe this warning may cause electrical shock
hazard or may damage internal or external circuit components.
The information in this manual is believed to be accurate in all respects. However, BASE Electronics cannot
assume responsibility for any consequences resulting from the use thereof. The information contained herein is
subject to change and BASE Electronics may issue a revision to incorporate such changes at any time.
INSTALLATION
Locate the unit inside a UL Listed NEMA 1 enclosure (such as a BASE LVPC Low
Voltage Power Cabinet) close to the source power supply. Drill (4) 0.187" diameter
holes to match the (4) corner holes in the printed circuit board. Push the nylon stand-
offs supplied into each hole and snap the module into place.
Note: To comply with UL294 - Standard For Safety - Access Control System Units
and the limitations of the UL product Listing, the LV Module should be located within
the same room as the associated Access Control equipment and interconnect cabling
to the LV Module inputs.
POWER SUPPLY WIRING
Common Relay Control and Output Voltage If the output devices require a DC oper-
ating voltage, the Common Power Jumpers can remain intact and only one DC power
supply needs to be connected to the PWR input terminals. In this mode, the DC oper-
ating voltage of the control relays, output devices and the power supply must match.
Example: Output devices = 24VDC Maglocks, Power Supply = 24VDC, Relays must
be 24VDC.
Separate Relay Control and Output Voltage
By cutting the Common Power Jumpers, two separate power supplies of like or differ-
ent voltages can be used to power the output devices (use the PWR terminals) and
control relays (use the CTL terminals). The CTL power supply must be DC while the
PWR power supply can be either AC or DC.
Connect the power supply input leads to the terminal strip at the lower left side of the
module as shown in Figure 1. Use a minimum of 18AWG copper conductors for this
wiring and keep the length to the power supply as short as possible.
MODE CONFIGURATION
Each module includes 8D and 4X4 jumpers for configuring the mode of operation.
Continuous Power Mode When no jumpers are cut, the outputs are continuously
powered and unaffected by the Disconnect feature. If Emergency Power Disconnect
is not needed, do not cut any jumpers and do not install a 2-pole relay at the Discon-
nect Relay socket.
8 Disconnect Mode When the 8D jumper is cut, all 8 outputs will be disconnected by
the Disconnect Relay when the Fire Panel Interface control circuit is opened. A 2-pole
Disconnect Relay must be installed in the socket provided.
4 X 4 Mode When the 4 X 4 Jumper is cut, outputs 1-4 will operate in the Disconnect
mode and outputs 5-8 will be unaffected by the Disconnect feature. A 2-pole Discon-
nect Relay must be installed in the socket provided.
POWER DISCONNECT WIRING
A socket is provided for a 2-pole relay that is used to disconnect the output power
PWR during facility emergencies. The relay is DC powered from the power feeding
the CTL terminals. Normally closed dry contacts of a fire or life safety system panel
are used to control the disconnect relay at the 'F' terminals. The alarm contact should
be rated for the current required by the relay selected (normally less than 50mA at
12VDC).
The auxiliary output contacts of the Disconnect Relay can be monitored. Note that the
terminals designated NO and NC (shown in Figure 1) stand for Normally Open and
Normally Closed when the relay is de-energized. The terminal marked ST is a Spare
Terminal available for termination of an end-of-line resistor if needed.
OUTPUTS AND CONTROLS
Add the operating current ratings for each device to be powered from one output to
determine the expected operating current flow. Install a fuse for the output that will
trip when this value is exceeded. The value of the fuse selected for each output may be
written on the white area below the fuse for easy future reference.
Example A: Output 1 - (1) magnetic lock
operating current = 0.29A at 12 VDC
Install fuse rated just greater than 0.29A = 3/8A or 1/2A
Example B: Output 2 - (4) deadbolt locks
operating current = (4 x 0.40A) = 1.6A
Install fuse rated just greater than 1.6A = 2A
Add the operating current ratings for each control relay and install a control fuse that
will trip when this value is exceeded. The value of the fuse selected may be written on
the white area below the fuse for easy future reference.
When powering devices over considerable distances, the cabling resistance may be so
high that the voltage available at the device drops to an unacceptable level. To pre-
vent this from occuring, the system cabling should be designed with adequate sized
conductors.Use the Low Voltage System Cabling Design Guide in this manual for
help in obtaining the desired results. Wiring to output devices connects to the OUT-
PUTS terminals. Three terminals are provided for each output. 'NC' or 'NO' desig-
nates the fused output terminal. 'Com' designates the voltage Common terminal. Sug-
gested wiring methods for OUTPUTS and CONTROLS are shown in Figure 1.
LIGHTNING, TRANSIENT AND NOISE SUPPRESSION
Lightning or transient suppression devices may be installed at the LV-8A output terminals to protect control equip-
ment from induced voltages. A multi-screw, solid ground bar should be installed vertically next to the output side
of the module for connection of metal oxide varistors, transient suppression diodes, etc. If shielded cable is used
for output wiring, shield drain wires can be connected to the ground bar for line noise suppression. Run a minimum
#14AWG green stranded ground wire from the ground bar to the closest Service Ground. Grounding bars of the
type mentioned above can be separately supplied by BASE Electronics.
LOW VOLTAGE SYSTEM CABLING DESIGN GUIDE
With an improperly designed cabling system, the resistance of wire conductors may cause a voltage drop that
could significantly affect the performance of the powered device. The resistance of a given length of cabling and
its voltage drop at the given operating voltage can be calculated. This allows the affect on the powered device to be
estimated with adjustments in conductor size implemented in the design stage.
Example:
A CCTV camera requires 0.29A at 24 VAC and the estimated cable length from the power supply is 800 feet. The
camera specifications state that the camera will operate properly down to 21.0 VAC (a voltage drop of 3.0 volts
maximum). What should be the size of the power cable conductors? From the chart below, we observe that a pair
of 18AWG stranded copper conductors will have a resistance of 2 x 800 feet x 6.48 ohms/1000 feet. Using Ohm's
Law: E = I x R
E (voltage dropped) = I (the required current) x R (the cabling resistance)
E = (0.29) x (2 x 800 x (6.48/1000)) = 3.007 volts
Subtracting 3.007 volts from 24VAC leaves 20.993 volts available at the camera, an unacceptable level. When
16AWG conductors are used in the equation: E = (0.29) x (2 x 800 x (3.67/1000)) = 1.703 volts
Subtracting 1.703VAC from 24VAC leaves 22.297VAC available at the camera. Taking future expansion of a
second camera into account, the estimator may decide to increase the conductors to #14AWG as follows:
E = (2 x 0.29) x (2 x 800 x (2.31/1000)) = 2.14VAC dropped
When powering inductive devices (relay coils, electric strikes, magnetic locks, etc.), remember to install reversing
diodes (DC powered) or metal oxide varistors (AC powered) at the device terminals or as recommended by the
device manufacturer to counter the affect of Counter Magnetic Force (CMF).
Resistance of Copper Conductors
Solid Conductors Stranded Conductors
Wire Gage Resistance Wire Gage Stranding Resistance
(AWG) (Ω/1000') (AWG) (#/AWG) (Ω/1000')
10 1.00 10 37/26 1.11
12 1.59 12 7/20 1.45
14 2.53 14 7/22 2.31
16 4.02 16 7/24 3.67
18 6.39 18 16/30 6.48
20 10.15 20 10/30 10.32
22 16.14 22 7/30 14.74
24 25.67 24 7/32 23.30
/
